Machine for making blue-prints.



n n l l I I l l l I I l l l I l I II// f f f Patented luly 8 |902.

R. A. BELL.

MACHINE Fos MAKING BLUE PRINTS.

(Apphcatxon filed Nov 15, 1901 TH: Nonms varias co. Puoomwc ,'wAsmNcwN, n, c.

(No Model.)

UNITED STATES PATENT OFFICE.

ROBERT ANGELO BELL, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR. TO CHARLES A. BUTTER, OF PHILADELPHIA, PENNSYLVANIA.

MACHINE FOR MAKlNG BLUE-PRINTS.

SPEGIHCATION forming peut of Lettere Patent No. 704,232, dated Jury 8, 1902. Application filed November l5, 1901. Serial No. 82,462. (No modem To all whom, t may concern:

Be it known that I, ROBERT ANGELO BELL, a citizen of the United States, and a resident of the city and county of Philadelphia, State of Pennsylvania, have invented certain new and useful Improvements in Machines for Making Blue-Prints, of which the following is a specification.

My invention relates to improvements in lo machines for making'blue or other prints by artificial light; and the object of my invention is to furnish an apparatus of this character which will be adapted to make prints of Widely-varying size, and, if desired, a number of ditferent prints simultaneously.

My invention consists ot' two parts, viz: first, a glass cylinder against which the tracing, negative, or print to be copied is placed and means for holding against this tracing,

zo negative, or print the sensitive paper to which an image of the tracing, negative, or print is to be transferred, and, second, ol' means for steadily passing through said cylinder a light, preferably an electric-arc light,which will act upon said sensitive paper to fix thereon the image carried by the tracing, negative, or print.

In the accompanying drawings, forming part of this specification, Figure l is a per- 3o spective view of my print-making machine,

the hydraulic means for governing the movement of thel lamp being shown in section; Fig. 2, a sectional View through the adjustable stop for operating the cut-out controlling the current to the lamp; Fig. 3, a longitudi-- nal section through one end of the springactuated curtain-rollers.

For convenience in construction my glass cylinder is made in two parts a l), which are 4o held at the top and bottom by metallic rings c c'. The lower ring c is carried upon rollers d, which travel upon a circular track e. By means of these rollers the cylinder and its connected parts may be revolved around its vertical axis for convenience in adjustment of the paper, ctc.

fg are vertical shafts carried at the top and bottom by rings c c and carrying at each end rollers 7L h', to which are attached one 5o end of a belt or chain fi i', the other end of which is attached to a carriage jj', which is furnished With rollers 7b' 7o', which are carried by and travel in a groovel on top of the ring c and on the bottom of the ring c', the rings c c' being identical in form, their construction 55 being clearly shown by the ring c.

Carried by carriages 7c 7i; 7o t'/ are rollers m m', similar in construction to the ordinary Hartshorn window-shade roller, and shown in section in Fig. The rollers m m' carry 6o curtains n n, the outer ends of which are permanently secured, by preference, to a strip o, carried by rings c c@ Upon the shafts f g are bevel-gears p, and meshing with these gears are gears r, which are carried by brackets s and which may be revolved by cranks t. By revolving cranks t in one direction the shaftsfg will be revolved, so as to wind ribbons i 'i upon rollers h 7i and draw carriages 711k and rollers 'm toward the shafts. As the 7o rollers m are drawn toward shafts f g the curtains Q1, are unwound from the rollers and lie against the glass cylinder, against which has been placed the tracing, negative, or print tt, backed by the sensitive paper fu, and the spring w is wound up. The tracing and sene sitive paper are held tightly against the glass cylinder by the curtain until the print has been made, when a reversal of the cranks t will release ribbons or belts t', and the spring 8o "zu, Fig. 3, of the rollers m, unwinding, will revolve the rollers m and Wind thereon the curtains n. It will be observed that the winding of the curtains upon rollers m will draw carriages away from the shaftsfg, releasing the tracing and sensitive paper, which may be then removed.

represents pins or rollers carried by rings c c, which cause the belts or chains to travel in a circumferential path.

The cranks tt may be operated simultaneously, or but one of them may be operated, if it be desired to use but one side ol' the cylinder for printing purposes.

The tracing and sensitive paper being in place on the glass cylinder an electric-arc lamp lis lowered slowly and steadily through the cylinder, its rays acting equally upon all parts of the tracing and iixing the lines of the tracing upon the sensitive paper. necessary that the lamp be moved steadily, so that all parts of tho sensitive paper may Itis 10o be subjected to the same amount of light; otherwise some parts may be overexposed while others would be underexposed. To cause the lamp to be moved steadily, I carry it upon a cord or cords 2, which pass'over pulleys 3 4 to a continuation or another' cord 5, which passes around a pulley 6, then up and over a pulley 7, then down to a fastening' 8. The pulley 7 is carried upon the upper end ot' a toothed rod 9, which gears with a gear 10, which may be rotated bya crank 11. The lower end of rod E) is secured to a piston 12, working in a cylinder 13, which contains some liquid. The lower end of piston 13 is connected to a reservoir 17 by a passage 14E, which leads toa passage 15, and the latter to a passage 16, connecting with the under part of reservoir 17, as shown. The liow of liquid from cylinder 13 to reservoir 17 is controlled by a valve 18 in passages 15 or 16. 19 is a pipe connecting top of cylinder 13 with reservoir 17, which will carry to the reservoir any liquid that may find itself on top of piston 12. The pulley 7 and rod 9 having been raised by means of gear 10, the lamp will be in the position shown in the drawings. The valve 18 is now opened and the liquid allowed to escape from cylinder 13 to reservoir17, permitting piston l2 to sink and with it the lamp 1. The rapidity ot movement of the lamp will depend upon the amount that valve 18 is opened. The lamp having traversed the cylinder, or so much of it as may be necessary, the current is shut off through switch 19, when the prints maybe removed from the cylinder and Washed or otherwise treated, as may be necessary. A new set of prints may now be placed in the machine, the lamp again lifted, lighted, and dropped, and so on.

2O is a stop carried by cords 2, which is furnished with a spring 21, which normally forces the pieces 22 against cords 2. The stop 20 can be moved up ordown on the cords 2 and is adapted to engage the pin 23 to operate the cut-out to extinguish the light. The higher that stop 2() is moved the sooner will the lamp be extinguished, and vice versa. This device is useful when but a small print is being made and it is only desired to have the lamp lighted fora portion of its travel. The device is also useful for automatically extinguishing the lamp when it is at the end ot' its full travel through the cylinder.

Having thus described my invention, I claim- 1. The combination in a machine for making prints, of a glass platen, a curtain one end of which is secured to a line along said platen, a spring-actuated roller to which the other end of said curtain is secured, and means for drawing said roller across said platen.

2. In a machine for making prints, in combination, a glass cylinder, rings secured to the top and bottom of said cylinder, a curtain one end of which is fixed to said cylinder, a spring-actuated roller to which the other end of said curtain is secured, means carried by said rings for carrying said roller, and means for drawing said roller and connected parts circumferentially around said glass cylinder.

3. In a machine for making prints, in combination, a sectional glass cylinder, metallic .rings carried by and securing the ends of said sections, a curtain secured to said cylinder upon a line parallel with its axis, spring-actuated rollers upon which the ends of said curtain are rolled, means carried lby said rings for carrying said rollers, and means for drawing said rollers circnmferentially around said glass cylinder toward one another and away from the point at which said curtain is secured to said cylinder.

4f. In a machine for making prints, in combination, a glass cylinder, metallic rings carried by the ends ot said cylinder furnished with grooves concentric with said cylinder, a curtain one end of which is secured to said cylinder, a spring-actuated roller to which the other end of said curtain is secured, carriages carried by said rings carrying the ends of said roller and being guided in their movements by said grooves in said rings, a shaft, pulleys upon said shaft, belts secured at one end to said carriages and at the other to said pulleys, a gear-wheel upon said shaft, a gearwheel meshing with said rst gear, and means for revolving said latter gear.

5. r1`he combination with the glass cylinder and the curtains as described, of a lamp, a cord one end of which is secured to said lamp and the other to a fixed point, a stationary pulley under which said cord passes, a movable pulley over which said cord passes, a rod carrying said latter pulley, a piston to which said rod is secured, a cylinder in which said piston Works, a reservoir, a connection between said reservoir and said cylinder, and a Valve by means of which the llow of liquid from said cylinder to said reservoir, or vice Versa, may be controlled.

ROBERT ANGELO BELL.

IVitnesses:

J. L. Yosr, GEORGE W. SELTZER.

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